CN202440803U - Air-entraining structure for flood releasing building - Google Patents
Air-entraining structure for flood releasing building Download PDFInfo
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- CN202440803U CN202440803U CN2012200449623U CN201220044962U CN202440803U CN 202440803 U CN202440803 U CN 202440803U CN 2012200449623 U CN2012200449623 U CN 2012200449623U CN 201220044962 U CN201220044962 U CN 201220044962U CN 202440803 U CN202440803 U CN 202440803U
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Abstract
The utility model discloses an air-entraining structure for a flood releasing building, which can prevent backflow of water flow. The air-entraining structure comprises a flip bucket and an air supplying hole which are arranged on a flow-passing surface of the flood releasing building; an outlet of the air supplying hole is positioned at the downstream end of the flip bucket; the flow-passing surface of the flood releasing building is provided with a water resisting structure for preventing backflow of the water flow; and the water resisting structure is positioned at the downstream of the flip bucket. The air-entraining structure has the advantages that by the water resisting structure, gathered water in a cavity due to backflow of the water flow can be avoided, the fluctuation of the backflow of the water flow also can be avoided, the stable cavity can be formed, the air-entraining effect is obvious, and the air-entraining and corrosion-inhibiting effects can be guaranteed; a steep slope and a gentle slope are arranged on the flow-passing surface of the flood releasing building, so that the backflow of the water flow can be effectively avoided, the gathered water in the cavity can be eliminated, and further the air-entraining and corrosion-inhibiting effects can be guaranteed; and a ridged groove is arranged on the flip bucket, thus the air-entraining effect can be improved. Therefore, the air-entraining structure is suitable for being popularized and applied in the field of water conservancy and hydropower engineering.
Description
Technical field
The utility model relates to the Hydraulic and Hydro-Power Engineering field, especially a kind of aeration structure that is used for flood releasing structure.
Background technology
When utilizing flood releasing structure to carry out flood discharge, because the flow velocity of current is higher, the flow-passing surface to flood releasing structure causes cavitation erosion easily, thereby influences the application life of flood releasing structure.The cavitation erosion that the flow-passing surface of building is caused for effective deduction and exemption high-velocity flow is according to the experience of flood releasing structure operation, when the flow rate of water flow of flow-passing surface surpasses 35m/s; The air mixing corrosion reducing structure should be set on the flow-passing surface of flood releasing structure, and at present, the aeration structure that is adopted comprises chooses bank, tonifying Qi hole on the flow-passing surface that is arranged on flood releasing structure; The said bank of choosing is provided with trapezoidal bank groove, and the outlet in tonifying Qi hole is positioned at the downstream of choosing bank, and high-velocity flow is through after choosing bank; At once break away from flow-passing surface, form jet, cavity appears in below the water jets thigh or side; Through the tonifying Qi hole air is imported cavity, the water jets thigh forms aerationzone with diffused air aeration in flow process; When it falls back to the flow-passing surface of flood releasing structure again, be involved in the part air again, cause downstream to become aerated flow near the water layer of inwall; Along can keeping its aeration concentrater to be not less than the effective least concentration value of a certain corrosion protection in the journey certain distance, thus the unlikely cavitation erosion that suffers of the flow-passing surface of this segment distance.
But; Along with the landform limitation that more large medium-size station hinge is arranged, quite a few outlet structure escape works circuit is long, and this flood releasing structure forms slow base slope easily; Flow rate of water flow is at 30～35m/s; And the dark discharge per unit width of the depth of water is big, the Fr number is lower, though flow rate of water flow does not surpass 35m/s, but still the air mixing corrosion reducing measure need be set.Because the aeration drag effects can be ignored when current flowed at low Fr number, but the gravity effect highly significant adopts traditional aeration structure; In the aeration process, cavity zone current streamline is crooked serious, usually can occur ponding because current are recalled in the aeration cavity; Particularly particularly outstanding than time slack at base slope, owing to recall the fluctuation of current, the cavity instability can appear; Even unfavorable fluidised form such as cavity disappearance, influence the effect of air mixing corrosion reducing.
The utility model content
The utility model technical problem to be solved provides a kind of aeration structure that is used for flood releasing structure of avoiding current to recall.
The utility model solves the technical scheme that its technical problem adopted: this is used for the aeration structure of flood releasing structure; Comprise and choose bank, tonifying Qi hole on the flow-passing surface that is arranged on flood releasing structure; The outlet in tonifying Qi hole is positioned at the downstream of choosing bank; The flow-passing surface of said flood releasing structure is provided with the stop water that prevents that current from recalling, and said stop water is positioned at chooses the bank downstream.
Further be, the abrupt slope be set form described stop water that the domatic of said abrupt slope extends along water (flow) direction on the flow-passing surface of flood releasing structure.
Further be, the flow-passing surface of said flood releasing structure is provided with the gentle slope, and is choosing between bank and the abrupt slope on the gentle slope, and the domatic Parallel to the flow direction on gentle slope extends to the top, slope on abrupt slope.
Further be that the said bank of choosing is provided with the bank groove.
Further be that the cross sectional shape of said bank groove is trapezoidal.
Further be that the outlet in said tonifying Qi hole is shaped as gradually low trapezoidal in upper reaches rectangle, downstream.
The beneficial effect of the utility model is: prevent the stop water that current are recalled through on the flow-passing surface of flood releasing structure, being provided with; When current when low Fr number flows; Can avoid in the cavity fluctuation of current also can not occurring recalling through stop water, can form stable cavity because current are recalled and ponding occurred; The aeration effect is obvious, can guarantee the effect of air mixing corrosion reducing.The stop water that the abrupt slope forms is set on the flow-passing surface of flood releasing structure, and simple in structure, cost is low, and can effectively avoid occurring current and recall, thereby guarantees the effect of air mixing corrosion reducing.On the flow-passing surface of flood releasing structure, the gentle slope is set, can eliminates the ponding that exists in the cavity, avoid the ponding in the cavity too much, thereby influence the aeration effect.The bank groove is set choosing on the bank, when current through after choosing bank, can form a plurality of cavitys that communicate with each other, can increase the contact area of air and current, raising aeration effect.The cross sectional shape of bank groove is set to trapezoidal, can make flow smooth and easy without hindrance.The outlet shape in tonifying Qi hole is set to gradually low trapezoidal in upper reaches rectangle, downstream, because cavity is along water (flow) direction step-down gradually, the tonifying Qi hole exits of this shape can satisfy the requirement of tonifying Qi hole area to greatest extent, increases the air compensation of air.
Description of drawings
Fig. 1 is the aeration structure sketch map that the utility model is used for flood releasing structure;
Description of symbols among the figure: choose bank 1, tonifying Qi hole 2, outlet 3, abrupt slope 4, gentle slope 5, bank groove 6.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1; This is used for the aeration structure of flood releasing structure; Comprise and choose bank 1, tonifying Qi hole 2 on the flow-passing surface that is arranged on flood releasing structure; The outlet 3 in tonifying Qi hole 2 is positioned at the downstream of choosing bank 1, and the flow-passing surface of said flood releasing structure is provided with the stop water that prevents that current from recalling, and said stop water is positioned at chooses bank 1 downstream.This course of work of aeration structure that is used for flood releasing structure is following: when high-velocity flow through after choosing bank 1, break away from flow-passing surface at once, form jet; Cavity appears in below the water jets thigh or side, through tonifying Qi hole 2 air is imported cavity, and the water jets thigh is in flow process; Diffused air aeration is formed aerationzone, when it falls back to the flow-passing surface of big vast building again, be involved in the part air again; When current when low Fr number flows, receive the influence of gravity, the current that fall back to the flow-passing surface of flood releasing structure again can be recalled phenomenon; Owing on the flow-passing surface of flood releasing structure, be provided with the stop water that prevents that current from recalling,, can avoid in the cavity recalling through stop water and ponding occurs because of current even current are when low Fr number flows; The fluctuation of current can not appear recalling yet; Can form stable cavity, the aeration effect is obvious, can guarantee the effect of air mixing corrosion reducing.Said stop water can have numerous embodiments, for example, described stop waters such as baffle plate, convexity can be set on the flow-passing surface of flood releasing structure; As preferred mode be: abrupt slope 4 is set on the flow-passing surface of flood releasing structure forms described stop water; The domatic of said abrupt slope 4 extends along water (flow) direction, and this stop water not only can effectively be avoided occurring current and recalls, thereby guarantees the effect of air mixing corrosion reducing; Current can flow along domatic simultaneously; Can make flow more smooth and easy, and simple in structure, and cost is low.
In order to eliminate the ponding that exists in the cavity; Avoid the ponding in the cavity too much, thereby influence the aeration effect, the flow-passing surface of said flood releasing structure is provided with gentle slope 5; Is choosing between bank 1 and the abrupt slope 4 on gentle slope 5; And the domatic Parallel to the flow direction on gentle slope 5 extends to the slope top on abrupt slope 4, the ponding in the cavity along the gentle slope 5 sloping underflows and then taken away to 5 both sides, gentle slope by current.
In order to improve the aeration effect, bank groove 6 is set choosing on the bank 1, when current through after choosing bank 1, can form a plurality of cavitys that communicate with each other, can increase the contact area of air and current, and then raising aeration effect.The cross sectional shape of said bank groove 6 can make arbitrary shape, and is smooth and easy without hindrance in order to make flow, and the cross sectional shape of general bank groove 6 is set to trapezoidal.
In the above-described embodiment; Outlet 3 shapes in said tonifying Qi hole 2 can make arbitrary shape; Outlet 3 shapes in tonifying Qi hole 2 are set to gradually low trapezoidal in upper reaches rectangle, downstream; Because cavity is along water (flow) direction step-down gradually, tonifying Qi hole 2 outlets 3 of this shape can be satisfied tonifying Qi hole 2 area requirements to greatest extent, increase the air compensation of air.
Claims (6)
1. the aeration structure that is used for flood releasing structure; Comprise and choose bank (1), tonifying Qi hole (2) on the flow-passing surface that is arranged on flood releasing structure; The outlet (3) in tonifying Qi hole (2) is positioned at the downstream of choosing bank (1); It is characterized in that: the flow-passing surface of said flood releasing structure is provided with the stop water that prevents that current from recalling, and said stop water is positioned at chooses bank (1) downstream.
2. the aeration structure that is used for flood releasing structure as claimed in claim 1 is characterized in that: abrupt slope (4) is set on the flow-passing surface of flood releasing structure forms described stop water, the domatic of said abrupt slope (4) extends along water (flow) direction.
3. the aeration structure that is used for flood releasing structure as claimed in claim 2; It is characterized in that: the flow-passing surface of said flood releasing structure is provided with gentle slope (5); Gentle slope (5) is positioned at chooses between bank (1) and abrupt slope (4), and the domatic Parallel to the flow direction of gentle slope (5) extends to the top, slope on abrupt slope (4).
4. according to the described aeration structure that is used for flood releasing structure of any claim in the claim 1 to 3, it is characterized in that: the said bank (1) of choosing is provided with bank groove (6).
5. the aeration structure that is used for flood releasing structure as claimed in claim 4 is characterized in that: the cross sectional shape of said bank groove (6) is trapezoidal.
6. the aeration structure that is used for flood releasing structure as claimed in claim 5 is characterized in that: the outlet (3) in said tonifying Qi hole (2) is shaped as gradually low trapezoidal in upper reaches rectangle, downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449623U CN202440803U (en) | 2012-02-13 | 2012-02-13 | Air-entraining structure for flood releasing building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449623U CN202440803U (en) | 2012-02-13 | 2012-02-13 | Air-entraining structure for flood releasing building |
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| Publication Number | Publication Date |
|---|---|
| CN202440803U true CN202440803U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200449623U Expired - Lifetime CN202440803U (en) | 2012-02-13 | 2012-02-13 | Air-entraining structure for flood releasing building |
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| CN (1) | CN202440803U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966082A (en) * | 2012-12-11 | 2013-03-13 | 中国水电顾问集团西北勘测设计研究院 | Aeration facility with downward-bent base slab |
| CN103290818A (en) * | 2013-07-01 | 2013-09-11 | 中国水电顾问集团中南勘测设计研究院 | Structure for inhibiting water flow cavitation of outlet structure |
| CN104389299A (en) * | 2014-10-28 | 2015-03-04 | 中国电建集团成都勘测设计研究院有限公司 | Aeration structure for Longluowei flood discharging tunnel |
| CN105220662A (en) * | 2015-10-23 | 2016-01-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of " dovetail bank+subsides slope " aeration method and structure |
| CN105256771A (en) * | 2015-10-23 | 2016-01-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Small base slope flow channel aerating method and two-dimensional dovetail ridge structure |
| CN105821814A (en) * | 2016-03-25 | 2016-08-03 | 四川大学 | Deep slot type flip bucket free of water accumulation |
| CN105923667A (en) * | 2016-06-17 | 2016-09-07 | 扬州大学 | Pressurizing algae control aeration device for inhibiting growth of blue-green algae in aquaculture water and control method for such device |
| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
| CN109083107A (en) * | 2018-07-17 | 2018-12-25 | 四川大学 | It is a kind of to choose the air entraining facilities that stream forms aerated cavity using water flow centripetal force inertia |
| CN112609643A (en) * | 2020-12-21 | 2021-04-06 | 大连理工大学 | Aeration facility combining dovetail ridge and wedge-shaped groove |
-
2012
- 2012-02-13 CN CN2012200449623U patent/CN202440803U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966082A (en) * | 2012-12-11 | 2013-03-13 | 中国水电顾问集团西北勘测设计研究院 | Aeration facility with downward-bent base slab |
| CN103290818A (en) * | 2013-07-01 | 2013-09-11 | 中国水电顾问集团中南勘测设计研究院 | Structure for inhibiting water flow cavitation of outlet structure |
| CN104389299A (en) * | 2014-10-28 | 2015-03-04 | 中国电建集团成都勘测设计研究院有限公司 | Aeration structure for Longluowei flood discharging tunnel |
| CN105256771B (en) * | 2015-10-23 | 2018-06-29 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of Small Bottom Slope runner aeration method and two-dimentional dovetail bank structure |
| CN105220662A (en) * | 2015-10-23 | 2016-01-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of " dovetail bank+subsides slope " aeration method and structure |
| CN105256771A (en) * | 2015-10-23 | 2016-01-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Small base slope flow channel aerating method and two-dimensional dovetail ridge structure |
| CN105220662B (en) * | 2015-10-23 | 2017-11-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of " dovetail bank+patch slope " aeration method and structure |
| CN105821814A (en) * | 2016-03-25 | 2016-08-03 | 四川大学 | Deep slot type flip bucket free of water accumulation |
| CN105923667A (en) * | 2016-06-17 | 2016-09-07 | 扬州大学 | Pressurizing algae control aeration device for inhibiting growth of blue-green algae in aquaculture water and control method for such device |
| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
| CN109083107A (en) * | 2018-07-17 | 2018-12-25 | 四川大学 | It is a kind of to choose the air entraining facilities that stream forms aerated cavity using water flow centripetal force inertia |
| CN109083107B (en) * | 2018-07-17 | 2020-09-08 | 四川大学 | Aeration facility for forming aeration cavity by utilizing water flow centripetal force inertia turbulence |
| CN112609643A (en) * | 2020-12-21 | 2021-04-06 | 大连理工大学 | Aeration facility combining dovetail ridge and wedge-shaped groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU HYDROELECTRIC INVESTIGATION + DESIGN INSTI Free format text: FORMER NAME: CHENGDU HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF CHINA HYDROPOWER CONSU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee after: Chengdu Hydroelectric Investigation & Design Institute of SPC Address before: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee before: Chengdu Hydroelectric Investigation & Design Institute of China Hydropower Consu |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHINA POWER GROUP CHENGDU INVESTIGATION DESIGN + R Free format text: FORMER NAME: CHENGDU HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF SPC |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee after: Co., Ltd of Chengdu survey and design academy of electricity Jian group of China Address before: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee before: Chengdu Hydroelectric Investigation & Design Institute of SPC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |
|
| CX01 | Expiry of patent term |